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Bismuth titanate (Bi4Ti3O12) platelets were prepared by molten salt method in a new salt system of CaCl2-NaCl at 650-750 ℃, using bismuth nitrate pentahydrate (Bi (NO3)3·H2O) and titanium butoxide (Ti (OC4H9)4) as raw materials. The synthesis temperature of Bi4Ti3O12 platelets was decreased to 650 ℃ from 900-1100 ℃. The phase compositions and crystalline morphology of Bi4Ti3O12 platelets were investigated by XRD and SEM. The experimental results indicate that Bi4Ti3O12 platelets containing tetragonal and orthorhombic phase with the size of 1-3 μm can be synthesized at 650 ℃ for 2 h, and the orthorhombic phase becomes the dominant phase at 750 ℃ for 5 h. The size and proportion of Bi4Ti3O12 platelets increase with the increment of the calcining temperature and holding time. The proportion of platelets increases to about ninety percent, and the platelets grow up to about 3-10 μm at 750 ℃ for 5 h from 1-2 μm at 650 ℃ for 2 h. This technical route provides a new low-temperature molten salt system for preparing platelets by molten salt methods.
Bismuth titanate (Bi4Ti3O12) platelets were prepared by molten salt method in a new salt system of CaCl2-NaCl at 650-750 ° C using bismuth nitrate pentahydrate (Bi (NO3) 3 · H2O) and titanium butoxide (Ti (OC4H9) 4) The synthesis compositions of the Bi4Ti3O12 platelets were decreased to 650 ° C from 900-1100 ° C. The phase compositions and crystalline morphology of Bi4Ti3O12 platelets were investigated by XRD and SEM. The experimental results indicate that Bi4Ti3O12 platelets containing tetragonal and orthorhombic phase with the size of 1-3 μm can be synthesized at 650 ° C. for 2 h, and the orthorhombic phase becomes the dominant phase at 750 ° C. for 5 h. The size and proportion of Bi 4 Ti 3 O 12 platelets increase with the increment of the calcining temperature and holding time . The proportion of platelets increases to about ninety percent, and the platelets grow up to about 3-10 μm at 750 ° C for 5 h from 1-2 μm at 650 ° C for 2 h. This technical route provides a new low-tempe rature molten salt system for preparing platelets by molten salt methods.